I think you take both of your DPS misconceptions out of context and go out of your way to misinterpret their common meanings.

Quote Originally Posted by givemeraptors View Post
1) Tanks (or healers) know the fight best.
In dungeons the tank leads the party, pulling mobs and controlling aggro and mob positioning. It doesn't matter if the rest of the party has this knowledge, it is the tank's responsibility. In primal fights and in Coil there is more responsibility to go around. "Tank has to know the dungeon," is a quote I can agree with though. Mostly healers follow the tank and DPS follow the mob the tank has selected.

2) DPS derps/bad DPS aren't noticeable.
If DPS is bad overall, that is easy to see. It's harder to single out which of your DPS is at fault and to what extent.